ZJ40 / 2250LDB Rig

ZJ40/2250LDB rig adopts 3 diesel engines coupling units are compounded by compounding transmission case to drive Drawworks and mud pumps, and it has standby interfaces（auto-air compressor and energy-saving generator.） The main brake of Drawworks adopts hydraulic disc brake. the auxiliary brake is electromagnetic brake. Rotary table is independent driven. AC variable frequency speed regulating motor drives rotary table to drill well operation through one two-shift transmission box and cardan shaft.

1.Substructure adopts the modular mode, and blocks connect with each other by pins, which can realize to move quickly. 

2.Mast is front open-face,"K"type mast. The five sections of mast is tower-type integral structure, can install with the crown block to move together. The supporting leg is located at base of substructure. stability is good, It is raised and laid down by Drawworks as a whole. 

3.The rig is equipped with frequency conversion（VFD） and MCC system. Frequency conversion（VFD） is used to control AC frequency conversion motor and the automatic bit feeding motors of rotary table; MCC is used to control other devices.